Patch merged into coreboot/master: c4301f7 arm64: introduce data cache ops by set/way to the level specified

the following patch was just integrated into master:
commit c4301f79691995dfedb56cb3e20adea3ecd8f596
Author: Joseph Lo 
Date:   Tue Apr 14 16:03:58 2015 +0800

arm64: introduce data cache ops by set/way to the level specified

This patchs introduces level specific data cache maintenance operations
    to cache_helpers.S. It's derived form ARM trusted firmware repository.
    Please reference here.

https://github.com/ARM-software/arm-trusted-firmware/blob/master/
    lib/aarch64/cache_helpers.S

BRANCH=none
    BUG=none
    TEST=boot on smaug/foster

Change-Id: Ib58a6d6f95eb51ce5d80749ff51d9d389b0d1343
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: b3d1a16bd0089740f1f2257146c771783beece82
    Original-Change-Id: Ifcd1dbcd868331107d0d47af73545a3a159fdff6
    Original-Signed-off-by: Joseph Lo 
    Original-Reviewed-on: https://chromium-review.googlesource.com/265826
    Original-Reviewed-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/9979
    Tested-by: build bot (Jenkins)
    Reviewed-by: Marc Jones

See http://review.coreboot.org/9979 for details.

-gerrit